<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>侧轴学习-单行</title>
    <style>
        .box{
            width: 600px;
            height: 500px;
            border: #888888 1px solid;
            display: flex;


            /*侧轴起点对齐*/
            /*align-items: flex-start;*/


            /*侧轴终点对齐*/
            /*align-items: flex-end;*/


            /*侧轴居中对齐*/
            /*align-items: center;*/


            /*伸缩项目的第一行文字的基线对齐*/
            /*align-items: baseline;*/


            /*如果伸缩项目未设置高度，将占满整个容器的高度   默认值*/
            /*align-items: stretch;*/
        }
        .box1{
            width: 90px;
            height: 150px;
            border: black 1px solid;
        }
        .box2{
            width: 100px;
            height: 200px;
            border: black 1px solid;
        }
        .box3{
            width: 110px;
            height: 100px;
            border: black 1px solid;
        }
    </style>
</head>
<body>
<!--

-->
        <div class="box">
            <div class="box1">1</div> <div class="box2">2</div> <div class="box3">3</div>
        </div>
</body>
</html>